Stir chickpeas into the pot. Increase heat to high; cook until chickpeas start to turn golden and are coated with the onion mixture. Pour in lemon juice, coconut milk, and 1 teaspoon salt. Bring to a simmer; reduce heat and cook until flavors combine, about 10 minutes. Stir in kale, 1 handful at a time, until wilted, about 5 minutes.